台阶色谱法

吗啡和甲基安非他明单克隆抗体联合胶体金检测试卡的研制

多级色谱纯化牛胎盘免疫调节多肽及性质测定

goose-step

step motor (stepping motor, pulse motor)

boost(increase, raise，or step up) production both intensively and extensively

step for climbing

multimode step-index optical fiber

differential pump (multistage pump, multi-cellular pump, step piston pump)

step ga(u)ge【计量】

current step